Electricity generation from solar resources in the United States reached 77 million megawatthours (MWh) in 2017, surpassing for the first time annual generation from biomass resources, which generated 64 million MWh in 2017. read...

In 2008 renewable energy produced 18.5% of the world’s total electricity, mostly from hydroelectric power. An onslaught of wind and solar capacity installations in recent years has pushed that number to about 25% today — and it could reach 30% by 2022. In...

The National Renewable Energy Laboratory (NREL) performed a meta-analysis of studies that examined the long term degradation rates of various PV panels. They found that the 1% per year rule was somewhat pessimistic for panels made prior to the year 2000, and today’s...